UPD78P322 datasheet(13/56 Pages) NEC

13 / 56 page

µPD78P322

(2)

Non-Port Pins (2/2)

1.2 PROM Programming Mode (RESET = H, AVDD = L)

Pin Name Input/Output

Function

AVDD

Input

PROM programming mode setting.

RESET

A0-A14

Input

Address bus.

D0-D7

Input/Output

Data bus.

Input

PROM enable to PROM.

Input

Read strobe to PROM.

VPP

—

Write power supply.

VDD

Positive power supply.

VSS

GND.

No internal connection. Connect to VSS (can leave open).

Pin Name Input/Output

Function

Alternate

Function

AN0-AN7

Input

Analog input to A/D converter.

P70-P77

AVREF

Input

A/D converter reference voltage input.

—

AVDD

—

A/D converter analog power supply.

—

AVSS

—

A/D converter GND.

—

RESET

Input

System reset input.

—

Input

Crystal resonator connection pin for system clock generation. To supply external clock,

—

input to the X1 and input inverted signal to the X2 pin (X2 pin can be unconnected.)

VDD

—

Positive power supply pin.

—

VSS

—

GND pin.

—

No internal connection. Connect to VSS (can leave open).

—

UPD78P322 Datasheet(PDF) 13 Page - NEC

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